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Richmond Gear GM85373

Excel Ring & Pinion Gear Set GM 8.5" & 8.625" 12 Bolt Ratio: 3.73

Richmond Gear GM85373
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836-GM85373

Richmond Gear GM85373 Excel Ring & Pinion Gear Set GM 8.5" & 8.625" 12 Bolt Ratio: 3.73 $164.95
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JEGS Performance Products GM 10-Bolt Ring & Pinion 8.5" Diameter Ring Gear (Corporate/New Style)
JEGS Performance Products 555-60031
$135.99
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Excel Ring & Pinion Gear Set
GM 8.5" & 8.625" 12 Bolt
  • Ratio: 3.73
  • Teeth: 41-11

  • Richmond Gear GM85373 Details

    8.5 & 8.625" GM

  • Fits Carriers 2.73 and Higher
  • 8.50 & 8.625" Diameter Ring Gear
  • 1.626" Pinion Diameter
  • 30 Spline Pinion
  • 10 Hole Oval Cover

    Applications:

  • 1977-96 Buick Full Size
  • 1977-91 Blazer (K Series Front)
  • 1973-77 Apollo, Regal, Century
  • 1971-74 Biscayne
  • 1984-87 Grand National
  • 1971-75, 77-79 Skylark, GS
  • 1970-76 Chevelle
  • 1971-96 Chevy Full Size
  • 1970-79 Chevy II, Nova
  • 1971-81 Camaro, Firebird, TA
  • 1971-77 Cutlass
  • 1976-78 Electra
  • 1973-77 Gran Sport
  • 1970-81 GTO, Firebird
  • 1973-74 LeSabre
  • 1971-89 Olds Full Size
  • 1985-88 Olds, Hurst
  • 1971-89 Pontiac Full Size
  • 1985-88 Hurst Olds
  • 1973-75, 77-79 Omega
  • 1971-77 Grand Prix, Lemans
  • 1971-74, 96-96 Roadmaster
  • 1971-77 Ventura, Phoenix
  • 1972-81 Z28
  • 1970-76 Olds F65
  • 1980-02 C10, C15 (Rear)
  • 1980-02 K10, K15 (Rear)
  • 1977-87 K10, K20 (Front)
  • 1980-96 Suburban (Rear)
  • 1977-91 Suburban (Front)
  • 1973-76 El Camino
  • 1970-96 G10, G20 Van

  • Specifications:

    Gear Ratio
    3.73
    Axle Type
    GM 8.5 in.
    Position
    Front Or Rear
    Differential Case Design Type
    GM 8.5
    Ring Gear Tooth Quantity
    41
    Cover Bolt Quantity
    10
    Differential Case Design Type
    GM 8.625
    Ring Gear Diameter
    8.5
    Ring Gear Bolt Quantity
    10
    Pinion Shaft Diameter
    1.626
    Pinion Spline Count
    30
    Ring Gear Rotation
    Standard
    Pinion Gear Tooth Quantity
    11
    Ring Gear Material
    8620 Steel
    Differential Carrier Break
    2.73 and Higher
    Carrier Series
    3
    Cover Bolts
    10
    Installation Kit Included
    No
    Pinion Gear Teeth
    11
    Pinion Shaft Diameter (in.)
    1.626
    Pinion Spline Count
    30
    Quantity
    Sold as a set
    Ring and Pinion Ratio
    3.73:1
    Ring Gear Bolts
    10
    Ring Gear Diameter (in.)
    8.5
    Ring Gear Rotation
    Standard
    Ring Gear Teeth
    41
    Manufacturer's Part Number:
    GM85373

    Richmond Gear Excel Ring and Pinion Sets are manufactured to tight tolerances. The gear design, tooling, steel selection, heat treat recipes and quality requirements are specified by Richmond. Designed to withstand the abuse of high performance and daily driving.

    Choose The Gear Ratio That Is Best For Your Vehicle
    .

    Does Richmond Gear GM85373 fit your vehicle?

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    1973-1974 BUICK CENTURY

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1987-1988 BUICK ELECTRA

    • EngineType: ALL
    • SubModel: ALL

    1975-1976 OLDSMOBILE CUTLASS

    • Liter: 4.1
    • SubModel: S
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975 BUICK SKYLARK

    • Liter: 4.3
    • SubModel: SR
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1978-1979 BUICK ELECTRA

    • EngineType: ALL
    • SubModel: ALL

    1975-1977 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: S
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1974 OLDSMOBILE DELTA 88

    • CC: 5737
    • Liter: 5.7
    • SubModel: ROYALE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 CHEVROLET IMPALA

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1971 CHEVROLET CAPRICE

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    2011 CHEVROLET COLORADO

    • CC: 3654
    • Liter: 3.7
    • SubModel: WT
    • CUI: 223
    • EngineType: L5 ( 3.7 L / 223 )

    1976 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • SubModel: LT
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1974 CHEVROLET BEL AIR

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973 CHEVROLET BEL AIR

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976 BUICK ELECTRA

    • Liter: 5.7
    • SubModel: 225
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980 GMC K2500 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 CHEVROLET BISCAYNE

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1985-1987 OLDSMOBILE CUTLASS SALON

    • EngineType: ALL
    • SubModel: ALL

    1981-1982 OLDSMOBILE DELTA 88

    • Liter: 4.3
    • SubModel: ROYALE BROUGHAM
    • CUI: 260
    • EngineType: V8 ( 4.3 L / 260 )

    1975-1976 CHEVROLET IMPALA

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 GMC SPRINT

    • CC: 6556
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1981 CHEVROLET CAPRICE

    • Liter: 4.4
    • SubModel: CLASSIC
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    2014 CHEVROLET SILVERADO 1500

    • CC: 6162
    • Liter: 6.2
    • SubModel: LTZ
    • CUI: 376
    • EngineType: V8 ( 6.2 L / 376 )

    1973 CHEVROLET EL CAMINO

    • CC: 5031
    • Liter: 5.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1981 CHEVROLET CAMARO

    • CC: 5031
    • Liter: 5.0
    • SubModel: SPORT
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1972 CHEVROLET BISCAYNE

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974 CHEVROLET BEL AIR

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1985-1986 CHEVROLET G20 VAN

    • EngineType: ALL
    • SubModel: SPORTVAN

    1975 BUICK ELECTRA

    • EngineType: ALL
    • SubModel: LIMITED

    2014 CADILLAC ESCALADE

    • EngineType: ALL
    • SubModel: PREMIUM

    1986 GMC K2500 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 CHEVROLET BISCAYNE

    • CC: 5031
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1982-1987 OLDSMOBILE CUTLASS SUPREME

    • EngineType: ALL
    • SubModel: ALL

    2011-2012 GMC CANYON

    • EngineType: ALL
    • SubModel: ALL

    1977-1978 GMC K15 SUBURBAN

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1986 GMC K2500 SUBURBAN

    • EngineType: ALL
    • SubModel: SIERRA CLASSIC

    1972 PONTIAC BONNEVILLE

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971 PONTIAC GRAND PRIX

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971 OLDSMOBILE F85

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980 CHEVROLET K20 PICKUP

    • EngineType: ALL
    • SubModel: SCOTTSDALE

    1986 CHEVROLET K10 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1975 CHEVROLET CAMARO

    • Liter: 4.1
    • SubModel: RS
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1973-1974 GMC SPRINT

    • Liter: 7.4
    • SubModel: CUSTOM
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1974 OLDSMOBILE DELTA 88

    • CC: 7457
    • Liter: 7.5
    • Aspiration: N
    • SubModel: ROYALE
    • Engine Vin: R
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1980-1983 CHEVROLET CAPRICE

    • CC: 5031
    • Liter: 5.0
    • SubModel: CLASSIC
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1979-1980 GMC G25/G2500 VAN

    • Liter: 6.6
    • SubModel: VANDURA
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    2014 CHEVROLET SILVERADO 1500

    • EngineType: ALL
    • SubModel: WT

    1973 CHEVROLET EL CAMINO

    • CC: 5031
    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1980 CHEVROLET IMPALA

    • Liter: 3.8
    • SubModel: SPORT
    • CUI: 229
    • EngineType: V6 ( 3.8 L / 229 )

    1970-1971 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981 CHEVROLET CAMARO

    • Liter: 5.7
    • SubModel: SPORT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1987-1988 CHEVROLET V20 SUBURBAN

    • EngineType: ALL
    • SubModel: ALL

    1971 PONTIAC CATALINA

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1976 OLDSMOBILE OMEGA

    • Liter: 4.1
    • SubModel: F85
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1964-1965 CHEVROLET BISCAYNE

    • CC: 6704
    • Liter: 6.7
    • SubModel: BASE
    • CUI: 409
    • EngineType: V8 ( 6.7 L / 409 )

    1972 CHEVROLET BROOKWOOD

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1983 CHEVROLET IMPALA

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 CHEVROLET BEL AIR

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1994-1995 CHEVROLET G20 VAN

    • Liter: 6.5
    • SubModel: SPORTVAN
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1989 BUICK ELECTRA

    • EngineType: ALL
    • SubModel: LIMITED

    1974 OLDSMOBILE CUTLASS SUPREME

    • CC: 5737
    • Liter: 5.7
    • SubModel: CRUISER
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1976 CHEVROLET NOVA

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976-1979 CADILLAC SEVILLE

    • EngineType: ALL
    • SubModel: ALL

    1996-2014 GMC SAVANA 1500

    • EngineType: ALL
    • SubModel: ALL

    1971-1972 CHEVROLET BISCAYNE

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1972 PONTIAC CATALINA

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: BROUGHAM
    • Engine Vin: U
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1971-1974 OLDSMOBILE CUTLASS SUPREME

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    2004 GMC CANYON

    • EngineType: ALL
    • SubModel: SL

    1975-1976 GMC K15 SUBURBAN

    • Liter: 6.6
    • SubModel: SIERRA CLASSIC
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1981 PONTIAC FIREBIRD

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1978 CHEVROLET G10 VAN

    • EngineType: ALL
    • SubModel: ALL

    2000 GMC S15 JIMMY

    • EngineType: ALL
    • SubModel: DIAMOND EDITION

    1980 PONTIAC CATALINA

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 229
    • EngineType: V6 ( 3.8 L / 229 )

    1972-1974 CHEVROLET BEL AIR

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1974 PONTIAC GRANDVILLE

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 OLDSMOBILE OMEGA

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978 CHEVROLET K20 SUBURBAN

    • EngineType: ALL
    • SubModel: CUSTOM DELUXE

    1985-1987 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: ALL

    1972-1973 CHEVROLET CAMARO

    • CC: 4098
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1971 OLDSMOBILE DELTA 88

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: R
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1980 CHEVROLET K10 PICKUP

    • EngineType: ALL
    • SubModel: CHEYENNE

    1985-1986 CHEVROLET G10 VAN

    • EngineType: ALL
    • SubModel: SPORTVAN

    1973-1974 CHEVROLET NOVA

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972 CHEVROLET CAMARO

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: Z28
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    2007-2012 GMC YUKON

    • EngineType: ALL
    • SubModel: BASE

    1974 OLDSMOBILE DELTA 88

    • CC: 7457
    • Liter: 7.5
    • Aspiration: N
    • SubModel: ROYALE
    • Engine Vin: U
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1973-1974 CHEVROLET CAPRICE

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: CLASSIC
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978 GMC K15 SUBURBAN

    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974 PONTIAC LEMANS

    • CC: 5737
    • Liter: 5.7
    • SubModel: LUXURY
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 PONTIAC CATALINA

    • CC: 5733
    • Liter: 5.7
    • SubModel: BROUGHAM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1976 CHEVROLET MALIBU

    • EngineType: ALL
    • SubModel: LANDAU

    1995 GMC K1500 PICKUP

    • EngineType: ALL
    • SubModel: SIERRA SLS

    1982 GMC G25/G2500 VAN

    • Liter: 4.1
    • SubModel: VANDURA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1973 CHEVROLET EL CAMINO

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    2006 CHEVROLET SILVERADO 1500 HD

    • EngineType: ALL
    • SubModel: ALL

    1974 CHEVROLET EL CAMINO

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980 CHEVROLET IMPALA

    • Liter: 4.4
    • SubModel: SPORT
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1974 CHEVROLET NOVA

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: J
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: CRUISER

    1986 CHEVROLET G10 VAN

    • EngineType: ALL
    • SubModel: BONAVENTURE

    1987 CHEVROLET CAPRICE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )
    GM85373 - Richmond Gear Excel Ring & Pinion Sets is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Known for good quality workmanship/and ease . Good quality & Installation went well and gears are not noisy.
    Date published: 2015-02-14
    • y_2017, m_11, d_22, h_23
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